From patchwork Mon Jul 8 19:17:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kirti Wankhede X-Patchwork-Id: 11035697 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 49FB1138D for ; Mon, 8 Jul 2019 19:23:46 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 392BC2847B for ; Mon, 8 Jul 2019 19:23:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2CC8328516; Mon, 8 Jul 2019 19:23:46 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.0 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 9A4482847B for ; Mon, 8 Jul 2019 19:23:45 +0000 (UTC) Received: from localhost ([::1]:44186 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkZEm-0001Ac-V7 for patchwork-qemu-devel@patchwork.kernel.org; Mon, 08 Jul 2019 15:23:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:35278) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hkZCh-0005Wy-Vh for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:37 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hkZCa-0003L6-CC for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:30 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:6431) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hkZCW-0003I9-Pj for qemu-devel@nongnu.org; Mon, 08 Jul 2019 15:21:26 -0400 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 08 Jul 2019 12:21:18 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 08 Jul 2019 12:21:22 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 08 Jul 2019 12:21:22 -0700 Received: from HQMAIL108.nvidia.com (172.18.146.13) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 8 Jul 2019 19:21:22 +0000 Received: from kwankhede-dev.nvidia.com (10.124.1.5) by HQMAIL108.nvidia.com (172.18.146.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 8 Jul 2019 19:21:15 +0000 From: Kirti Wankhede To: , Date: Tue, 9 Jul 2019 00:47:30 +0530 Message-ID: <1562613452-24969-12-git-send-email-kwankhede@nvidia.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1562613452-24969-1-git-send-email-kwankhede@nvidia.com> References: <1562613452-24969-1-git-send-email-kwankhede@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1562613678; bh=mT9NULbJGg6LTARBbQoDJ+gzYGhsFo9Sdhs/e6OiKQM=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:X-NVConfidentiality:MIME-Version: Content-Type; b=Wlrltu7feJI87Sjrhhv0rz8u3tm5CzuOrvz1rAPquWkm/MfnYt1N+oA8JDn0vFbkF MmLC90iD+n3pmbKxzQzHhCRmmXhQKCJtJf2CdcKhjA8m8553xJ82VXttA/IqzXcGa7 pC8jBJD4apO4r03ILTfspVHz729CIBUXce9UXe8GlkZlFh6cqe5Nb5ebqNExMJ/P31 8O99je95C04vIs9EX0Duxf6nrARjz5EMawzK7W0F74VDwwaMZFWQ5bdPKxjG3+aipS srzKng5PHysxE/LRmtsbe0biEeKGDAICWNqx44WFif3xAkq7s45mFoFDisffO6NbIW DGrGnWA90vOcw== X-detected-operating-system: by eggs.gnu.org: Windows 7 or 8 X-Received-From: 216.228.121.143 Subject: [Qemu-devel] [PATCH v5 11/13] vfio: Add function to get dirty page list X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com, yi.l.liu@intel.com, yan.y.zhao@intel.com, eskultet@redhat.com, ziye.yang@intel.com, qemu-devel@nongnu.org, cohuck@redhat.com, shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com, zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com, aik@ozlabs.ru, Kirti Wankhede , eauger@redhat.com, felipe@nutanix.com, jonathan.davies@nutanix.com, changpeng.liu@intel.com, Ken.Xue@amd.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP Dirty page tracking (.log_sync) is part of RAM copying state, where vendor driver provides the bitmap of pages which are dirtied by vendor driver through migration region and as part of RAM copy, those pages gets copied to file stream. To get dirty page bitmap: - write start address, page_size and pfn count. - read count of pfns copied. - Vendor driver should return 0 if driver doesn't have any page to report dirty in given range. - Vendor driver should return -1 to mark all pages dirty for given range. - read data_offset, where vendor driver has written bitmap. - read bitmap from the region or mmaped part of the region. - Iterate above steps till page bitmap for all requested pfns are copied. Signed-off-by: Kirti Wankhede Reviewed-by: Neo Jia --- hw/vfio/migration.c | 123 ++++++++++++++++++++++++++++++++++++++++++ hw/vfio/trace-events | 4 +- include/hw/vfio/vfio-common.h | 2 + 3 files changed, 127 insertions(+), 2 deletions(-) diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 5fb4c5329ede..ca1a8c0f5f1f 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -269,6 +269,129 @@ static int vfio_load_device_config_state(QEMUFile *f, void *opaque) return qemu_file_get_error(f); } +void vfio_get_dirty_page_list(VFIODevice *vbasedev, + uint64_t start_pfn, + uint64_t pfn_count, + uint64_t page_size) +{ + VFIOMigration *migration = vbasedev->migration; + VFIORegion *region = &migration->region.buffer; + uint64_t count = 0; + int64_t copied_pfns = 0; + int64_t total_pfns = pfn_count; + int ret; + + qemu_mutex_lock(&migration->lock); + + while (total_pfns > 0) { + uint64_t bitmap_size, data_offset = 0; + uint64_t start = start_pfn + count; + void *buf = NULL; + bool buffer_mmaped = false; + + ret = pwrite(vbasedev->fd, &start, sizeof(start), + region->fd_offset + offsetof(struct vfio_device_migration_info, + start_pfn)); + if (ret < 0) { + error_report("%s: Failed to set dirty pages start address %d %s", + vbasedev->name, ret, strerror(errno)); + goto dpl_unlock; + } + + ret = pwrite(vbasedev->fd, &page_size, sizeof(page_size), + region->fd_offset + offsetof(struct vfio_device_migration_info, + page_size)); + if (ret < 0) { + error_report("%s: Failed to set dirty page size %d %s", + vbasedev->name, ret, strerror(errno)); + goto dpl_unlock; + } + + ret = pwrite(vbasedev->fd, &total_pfns, sizeof(total_pfns), + region->fd_offset + offsetof(struct vfio_device_migration_info, + total_pfns)); + if (ret < 0) { + error_report("%s: Failed to set dirty page total pfns %d %s", + vbasedev->name, ret, strerror(errno)); + goto dpl_unlock; + } + + /* Read copied dirty pfns */ + ret = pread(vbasedev->fd, &copied_pfns, sizeof(copied_pfns), + region->fd_offset + offsetof(struct vfio_device_migration_info, + copied_pfns)); + if (ret < 0) { + error_report("%s: Failed to get dirty pages bitmap count %d %s", + vbasedev->name, ret, strerror(errno)); + goto dpl_unlock; + } + + if (copied_pfns == VFIO_DEVICE_DIRTY_PFNS_NONE) { + /* + * copied_pfns could be 0 if driver doesn't have any page to + * report dirty in given range + */ + break; + } else if (copied_pfns == VFIO_DEVICE_DIRTY_PFNS_ALL) { + /* Mark all pages dirty for this range */ + cpu_physical_memory_set_dirty_range(start_pfn * page_size, + pfn_count * page_size, + DIRTY_MEMORY_MIGRATION); + break; + } + + bitmap_size = (BITS_TO_LONGS(copied_pfns) + 1) * sizeof(unsigned long); + + ret = pread(vbasedev->fd, &data_offset, sizeof(data_offset), + region->fd_offset + offsetof(struct vfio_device_migration_info, + data_offset)); + if (ret != sizeof(data_offset)) { + error_report("%s: Failed to get migration buffer data offset %d", + vbasedev->name, ret); + goto dpl_unlock; + } + + if (region->mmaps) { + buf = find_data_region(region, data_offset, bitmap_size); + } + + buffer_mmaped = (buf != NULL) ? true : false; + + if (!buffer_mmaped) { + buf = g_try_malloc0(bitmap_size); + if (!buf) { + error_report("%s: Error allocating buffer ", __func__); + goto dpl_unlock; + } + + ret = pread(vbasedev->fd, buf, bitmap_size, + region->fd_offset + data_offset); + if (ret != bitmap_size) { + error_report("%s: Failed to get dirty pages bitmap %d", + vbasedev->name, ret); + g_free(buf); + goto dpl_unlock; + } + } + + cpu_physical_memory_set_dirty_lebitmap((unsigned long *)buf, + (start_pfn + count) * page_size, + copied_pfns); + count += copied_pfns; + total_pfns -= copied_pfns; + + if (!buffer_mmaped) { + g_free(buf); + } + } + + trace_vfio_get_dirty_page_list(vbasedev->name, start_pfn, pfn_count, + page_size); + +dpl_unlock: + qemu_mutex_unlock(&migration->lock); +} + /* ---------------------------------------------------------------------- */ static int vfio_save_setup(QEMUFile *f, void *opaque) diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events index e01c94e6ebd4..268260eb862d 100644 --- a/hw/vfio/trace-events +++ b/hw/vfio/trace-events @@ -159,5 +159,5 @@ vfio_save_iterate(char *name, int data_size) " (%s) data_size %d" vfio_save_complete_precopy(char *name) " (%s)" vfio_load_device_config_state(char *name) " (%s)" vfio_load_state(char *name, uint64_t data) " (%s) data 0x%"PRIx64 -vfio_load_state_device_data(char *name, uint64_t data_offset, uint64_t data_size) " (%s), Offset 0x%"PRIx64" size 0x%"PRIx64 - +vfio_load_state_device_data(char *name, uint64_t data_offset, uint64_t data_size) " (%s), Offset 0x%"PRIx64" size 0x%"PRIx6 +vfio_get_dirty_page_list(char *name, uint64_t start, uint64_t pfn_count, uint64_t page_size) " (%s) start 0x%"PRIx64" pfn_count 0x%"PRIx64 " page size 0x%"PRIx64 diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index a022484d2636..dc1b83a0b4ef 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -222,5 +222,7 @@ int vfio_spapr_remove_window(VFIOContainer *container, int vfio_migration_probe(VFIODevice *vbasedev, Error **errp); void vfio_migration_finalize(VFIODevice *vbasedev); +void vfio_get_dirty_page_list(VFIODevice *vbasedev, uint64_t start_pfn, + uint64_t pfn_count, uint64_t page_size); #endif /* HW_VFIO_VFIO_COMMON_H */